Flow control device knob

ABSTRACT

The design consists of the features of ornament, shape, pattern and configuration of the flow control device shown in the drawings.

FIG. 1 is a perspective view of a flow control device knob showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a back elevation thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines are for illustrative purposes only and form no part of the claimed design. The broken lines showing indicia on the knob also do not form part of the claimed design. 

We claim the ornamental design for a flow control device knob, as shown and described. 